package com.sky.service.impl;

import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.google.gson.JsonObject;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

/**
 * 订单业务层
 */
@Service
public class OrderServiceImpl implements OrderService {
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WebSocketServer webSocketServer;

    @Override
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //1.判断购物车和地址是否为null
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null) {
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        ShoppingCart shoppingCart = ShoppingCart.builder()
                .userId(BaseContext.getCurrentId())
                .build();
        List<ShoppingCart> list = shoppingCartMapper.listOfShoppingCart(shoppingCart);
        if (list == null && list.size() == 0) {
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
        //2.向Order表插入一条数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, orders);
        orders.setPhone(addressBook.getPhone());
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setUserId(BaseContext.getCurrentId());
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setConsignee(addressBook.getConsignee());
        orders.setAddress(address(addressBook));
        orderMapper.insert(orders);
        //3.向OrderDetail表插入多条数据
        List<OrderDetail> orderDetails = new ArrayList<>();
        for (ShoppingCart cart : list) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(orders.getId());
            orderDetails.add(orderDetail);
        }
        orderDetailMapper.insertBatch(orderDetails);
        //4.清空购物车
        shoppingCartMapper.clean(BaseContext.getCurrentId());
        //5.返回订单
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .orderTime(orders.getOrderTime())
                .build();
        Map map = new HashMap();
        map.put("type",1);
        map.put("userId",orders.getUserId());
        map.put("content","您有一个新订单待处理："+orders.getNumber());
        String jsonString = JSONObject.toJSONString(map);
        webSocketServer.sendToAllClient(jsonString);
        return orderSubmitVO;
    }
    /**
     * 地址信息
     */
    private String address(AddressBook addressBook) {
        String address = addressBook.getProvinceName() + addressBook.getCityName() + addressBook.getDistrictName() + addressBook.getDetail();
        return address;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }
        OrderPaymentVO vo = OrderPaymentVO.builder()
                .build();
        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);
        Map map = new HashMap();
        map.put("type",1);
        map.put("userId",ordersDB.getUserId());
        map.put("content","您有一个新订单待处理："+ordersDB.getNumber());
        String jsonString = JSONObject.toJSONString(map);
        webSocketServer.sendToAllClient(jsonString);
    }

    @Override
    public PageResult getHistoryOrders(int page, int pageSize, Integer status) {
        PageHelper.startPage(page, pageSize);
        Long userId = BaseContext.getCurrentId();
        Page<Orders> ordersPage = orderMapper.pageQuery(status, userId);
        List<OrderVO> orderVOs = new ArrayList<>();
        if (ordersPage != null) {
            for (Orders orders : ordersPage) {
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orders.getId());
                orderVO.setOrderDetailList(orderDetails);
                orderVOs.add(orderVO);
            }
        }
        PageResult pageResult = new PageResult(ordersPage.getTotal(), orderVOs);
        return pageResult;
    }

    @Override
    public OrderVO getOrderVOById (Long id){
        Orders orders = orderMapper.getById(id);
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(id);
        orderVO.setOrderDetailList(orderDetails);
        return orderVO;
    }

    @Override
    public List<OrderDetail> getOrderDetailById(Long id) {
         List<OrderDetail> list = orderDetailMapper.getById(id);
         return list;
    }

    @Override
    @Transactional
    public void userCancelById(Long id) throws Exception {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        // 校验订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (ordersDB.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());

        // 订单处于待接单状态下取消，需要进行退款
        if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            //调用微信支付退款接口
            weChatPayUtil.refund(
                    ordersDB.getNumber(), //商户订单号
                    ordersDB.getNumber(), //商户退款单号
                    new BigDecimal(0.01),//退款金额，单位 元
                    new BigDecimal(0.01));//原订单金额

            //支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
        }

        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    @Override
    public OrderStatisticsVO statistics() {
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setConfirmed(orderMapper.countByStatus(Orders.CONFIRMED));
        orderStatisticsVO.setDeliveryInProgress(orderMapper.countByStatus(Orders.DELIVERY_IN_PROGRESS));
        orderStatisticsVO.setToBeConfirmed(orderMapper.countByStatus(Orders.TO_BE_CONFIRMED));
        return orderStatisticsVO;
    }

    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        Page<Orders> page = orderMapper.conditionSearch(ordersPageQueryDTO);
        List<OrderVO> orderVOs = getOrderVOs(page);
        return new PageResult(page.getTotal(), orderVOs);
    }

    @Override
    public void adminCancel(OrdersCancelDTO ordersCancelDTO) {
        Long id = ordersCancelDTO.getId();
        String cancelReason = ordersCancelDTO.getCancelReason();
        LocalDateTime cancelTime = LocalDateTime.now();
        Orders orders = new Orders();
        orders.setId(id);
        orders.setCancelTime(cancelTime);
        orders.setCancelReason(cancelReason);
        orders.setStatus(Orders.CANCELLED);
        orderMapper.update(orders);
    }

    @Override
    public OrderVO details(Long id) {
        Orders orders = orderMapper.getById(id);
        List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(id);
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        orderVO.setOrderDetailList(orderDetails);
        return orderVO;
    }

    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO){
        Orders orders = Orders.builder()
                        .id(ordersConfirmDTO.getId())
                        .status(Orders.CONFIRMED)
                        .build();
        orderMapper.update(orders);
    }

    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) throws Exception {
        Orders ordersDB = orderMapper.getById(ordersRejectionDTO.getId());
        /*weChatPayUtil.refund(
                ordersDB.getNumber(), //商户订单号
                ordersDB.getNumber(), //商户退款单号
                new BigDecimal(0.01),//退款金额，单位 元
                new BigDecimal(0.01));*/    //原订单金额
        ordersDB.setCancelReason(ordersRejectionDTO.getRejectionReason());
        ordersDB.setPayStatus(Orders.REFUND);
        ordersDB.setStatus(Orders.CANCELLED);
        orderMapper.update(ordersDB);
    }

    @Override
    public void delivery(Long id) {
        Orders orders =Orders.builder()
                .id(id)
                .status(Orders.DELIVERY_IN_PROGRESS)
                .build();
        orderMapper.update(orders);
    }

    @Override
    public void complete(Long id) {
        Orders orders =Orders.builder()
                .id(id)
                .status(Orders.COMPLETED)
                .build();
        orderMapper.update(orders);
    }

    @Override
    public void reminderOrder(Long id) {
        Orders orders = orderMapper.getById(id);
        Map map = new HashMap<>();
        map.put("type",2);
        map.put("orderId", id);
        map.put("content", "请尽快接单："+orders.getNumber());
        String jsonString = JSONObject.toJSONString(map);
        webSocketServer.sendToAllClient(jsonString);
    }

    private List<OrderVO> getOrderVOs(Page<Orders> page) {
        List<OrderVO> orderVOs = new ArrayList<>();
        List<Orders> orders = page.getResult();
        for(Orders order : orders) {
            OrderVO orderVO = new OrderVO();
            BeanUtils.copyProperties(order, orderVO);
            String orderDishes = getOrderDishesStr(order);
            orderVO.setOrderDishes(orderDishes);
            orderVOs.add(orderVO);
        }
        return orderVOs;
    }

    private String getOrderDishesStr(Orders orders) {//TODO 需要搞懂
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }
}
